Regarding debaters who don't really debate, the forum guidelines discourages non-responsive rhetoric. IOW, after a few warnings to please engage in real debate and give real responses, negative consequences will be earned.
We have 'lost' a few belligerant/nonresponsive people in this way, and I, for one, am grateful for the rules.
It's nice to not have to bang one's head against a brick wall all the time.